<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
	</body>
	<script type="text/javascript">
		/*
			 	类型							  结果
			Undefined						"undefined"
			Null							"object"
			Boolean							"boolean"
			Number							"number"
			String							"string"
		*/

		
	</script>
</html>
